# \#codesys **URL:** https://www.wago.community/tag/codesys/23.md [Latest](https://www.wago.community/latest.md) · [Categories](https://www.wago.community/categories.md) · [Tags](https://www.wago.community/tags.md) --- ## [Error message during online change](https://www.wago.community/t/fehlermeldung-bei-onlinechange/2824)
**Author:** [@radar17892](https://www.wago.community/u/radar17892)\ **Replies:** 5\ **Last updated:** [October 7, 2026, 11:05am UTC](https://www.wago.community/t/fehlermeldung-bei-onlinechange/2824 "2026-10-07T11:05:38Z")
Hello, Can someone tell me about this error message: Device message: “Alarm online change executed but license for Online Configuration Change not aviable!” I was still working on this controller last week … --- ## [Modbus tcp server on different ports, 750-899](https://www.wago.community/t/modbus-tcp-server-on-different-ports-750-899/2858)
**Author:** [@Yevhen\_ea](https://www.wago.community/u/Yevhen_ea)\ **Replies:** 6\ **Last updated:** [October 6, 2026, 8:28am UTC](https://www.wago.community/t/modbus-tcp-server-on-different-ports-750-899/2858 "2026-10-06T08:28:49Z")
Hello everyone, Which library do I need for my 750-899/… PLC if I want to listen different ports for Modbus TCP requests. The point is internal modbus server process all requests on 502 port, while I need to discrimina… --- ## [WAGO Process Image](https://www.wago.community/t/wago-process-image/2883)
**Author:** [@ValiantSailor](https://www.wago.community/u/ValiantSailor)\ **Replies:** 2\ **Last updated:** [September 30, 2026, 3:49pm UTC](https://www.wago.community/t/wago-process-image/2883 "2026-09-30T15:49:10Z")
Hej, I am trying to figure out how to built a standard block in Codesys (new to this) and Wago’s documentation isn’t the best. I have a list of channels and want to use the same FB for all channel configurations. The th… --- ## [How to configure and program a 750-670 Stepper Controller](https://www.wago.community/t/how-to-configure-and-program-a-750-670-stepper-controller/2880)
**Author:** [@MKNTF](https://www.wago.community/u/MKNTF)\ **Replies:** 3\ **Last updated:** [September 18, 2026, 1:00pm UTC](https://www.wago.community/t/how-to-configure-and-program-a-750-670-stepper-controller/2880 "2026-09-18T13:00:02Z")
Hello, I am writing to request assistance in preparing to program the WAGO 750-670 stepper motor controller using Structured Text (ST). I would like to develop a program that enables proper configuration and control of… --- ## [HowTo: Use UNION and STRUCT for Modbus Server mapping](https://www.wago.community/t/howto-use-union-and-struct-for-modbus-server-mapping/2876)
**Author:** [@AdamReeve](https://www.wago.community/u/AdamReeve)\ **Replies:** 0\ **Last updated:** [September 16, 2026, 1:42pm UTC](https://www.wago.community/t/howto-use-union-and-struct-for-modbus-server-mapping/2876 "2026-09-16T13:42:45Z")
One of my most commonly recreated examples for customers recently has been a walkthrough of using UNION and STRUCT DUTs to map Modbus Servers with mixed datatypes (i.e. DINT and REAL values as well as WORD values). Rathe… --- ## [How we solved secrets/passwords in a WAGO PFC300 (CODESYS) — Bitwarden Secrets Manager via a small bridge](https://www.wago.community/t/how-we-solved-secrets-passwords-in-a-wago-pfc300-codesys-bitwarden-secrets-manager-via-a-small-bridge/2867)
**Author:** [@espenbo](https://www.wago.community/u/espenbo)\ **Replies:** 0\ **Last updated:** [September 5, 2026, 11:55pm UTC](https://www.wago.community/t/how-we-solved-secrets-passwords-in-a-wago-pfc300-codesys-bitwarden-secrets-manager-via-a-small-bridge/2867 "2026-09-05T23:55:40Z")
I’ve been looking at the problem with passwords/API tokens in a CODESYS PLC project (WAGO PFC300), and I’m curious how others here handle the same thing. The problem: a WAGO PFC300 needs a password to authenticate again… --- ## [765-4501 port configuration query](https://www.wago.community/t/765-4501-port-configuration-query/2864)
**Author:** [@Justin](https://www.wago.community/u/Justin)\ **Replies:** 1\ **Last updated:** [September 3, 2026, 2:29pm UTC](https://www.wago.community/t/765-4501-port-configuration-query/2864 "2026-09-03T14:29:39Z")
I have a PFC200 (750-8217, FW 04.07.03(29)) connected to a 765-4501 IO-Link master, programmed in Structural Text using CODESYS 3.5 (SP21, Patch 1). The set-up is designed to accommodate various hardware configurations, … --- ## [Codesys 2.3 Library](https://www.wago.community/t/codesys-2-3-library/1755)
**Author:** [@pp0098](https://www.wago.community/u/pp0098)\ **Replies:** 6\ **Last updated:** [August 25, 2026, 3:26pm UTC](https://www.wago.community/t/codesys-2-3-library/1755 "2026-08-25T15:26:00Z")
I have a controller 750-8208 with programming software codesys v2.3.9.66. I want to read modbus tcp data through FB. When I load the library i.e. ModbusEthernet\_04.lib, the program shows error. Is there a way to upgrade … --- ## [Connect Control Panel with KBus](https://www.wago.community/t/control-panel-mit-kbus-verbinden/2850)
**Author:** [@MHee](https://www.wago.community/u/MHee)\ **Replies:** 2\ **Last updated:** [August 19, 2026, 1:41pm UTC](https://www.wago.community/t/control-panel-mit-kbus-verbinden/2850 "2026-08-19T13:41:07Z")
Hi, is it possible to connect Control Panel 762-5303 directly to the KBus and the IO cards, or do you have to go via Modbus, for example? Thanks! --- ## [I can't connect to the 750-8202/040-001](https://www.wago.community/t/i-cant-connect-to-the-750-8202-040-001/2839)
**Author:** [@emregl](https://www.wago.community/u/emregl)\ **Replies:** 6\ **Last updated:** [August 10, 2026, 6:01pm UTC](https://www.wago.community/t/i-cant-connect-to-the-750-8202-040-001/2839 "2026-08-10T18:01:24Z")
Which programme should I use to connect to a PLC with these specifications? I couldn’t find the WAGO library in Codesys 2.3 e cockpit tamamen kaldırılmış I need to update the firmware for Codesys 3.5, but I’m getting … --- ## [Error during Store and Download on WAGO\_750-831 BACnet controller](https://www.wago.community/t/erreur-lors-du-store-and-download-sur-controleur-wago-750-831-bacnet/2836)
**Author:** [@Albert](https://www.wago.community/u/Albert)\ **Replies:** 1\ **Last updated:** [August 3, 2026, 12:33am UTC](https://www.wago.community/t/erreur-lors-du-store-and-download-sur-controleur-wago-750-831-bacnet/2836 "2026-08-03T00:33:18Z")
Hello I'm having an issue with BACnet objects. Before, all analog values were zero. I manually added the points in the Mappings Client using the WAGO BACnet Configurator, and then the next day after … --- ## [How to use the CODESYS V3 Ethernet Driver in the WAGO VP200 HMI](https://www.wago.community/t/how-to-use-the-codesys-v3-ethernet-driver-in-the-wago-vp200-hmi/2649)
**Author:** [@JohnDitter](https://www.wago.community/u/JohnDitter)\ **Replies:** 3\ **Last updated:** [July 29, 2026, 9:44pm UTC](https://www.wago.community/t/how-to-use-the-codesys-v3-ethernet-driver-in-the-wago-vp200-hmi/2649 "2026-07-29T21:44:35Z")
Starting with Visual Designer version 5.2.2, WAGO VP200 HMI panels support the CODESYS V3 Ethernet driver, alongside a wide range of other communication drivers. This document details the configuration and use of the COD… --- ## [Custom Login Dialog](https://www.wago.community/t/custom-login-dialog/2817)
**Author:** [@RodPer18](https://www.wago.community/u/RodPer18)\ **Replies:** 5\ **Last updated:** [July 21, 2026, 10:56am UTC](https://www.wago.community/t/custom-login-dialog/2817 "2026-07-21T10:56:38Z")
Hi there, is it possible to make my own custom login dialog instead of using the native ugly codesys one? If there is can you explain how? Thanks! --- ## [WAGO PLC Firmware vs. CODESYS 3.5 & Device Description: Version Compatibility Guide](https://www.wago.community/t/wago-plc-firmware-vs-codesys-3-5-device-description-version-compatibility-guide/1567)
**Author:** [@Jacob](https://www.wago.community/u/Jacob)\ **Replies:** 6\ **Last updated:** [July 17, 2026, 9:06am UTC](https://www.wago.community/t/wago-plc-firmware-vs-codesys-3-5-device-description-version-compatibility-guide/1567 "2026-07-17T09:06:20Z")
To program and operate your WAGO PLC correctly, the PLC firmware, CODESYS 3.5 version, and WAGO Device Description must all be compatible. The firmware is the system software that enables the PLC to function, CODESYS is … --- ## [Error configuring IO terminal 750\_496\_16](https://www.wago.community/t/fehler-beim-konfigurieren-einer-io-klemme-750-496-16/2815)
**Author:** [@Hannah](https://www.wago.community/u/Hannah)\ **Replies:** 2\ **Last updated:** [July 14, 2026, 8:47am UTC](https://www.wago.community/t/fehler-beim-konfigurieren-einer-io-klemme-750-496-16/2815 "2026-07-14T08:47:51Z")
Hello everyone, I would like to configure my WAGO terminal (750\_496\_1) via Codesys. I am using the following function to configure my channels: aeChannel\_WagoModul\_750\_496\_SignalType\[1\] := 0; aeChannel\_WagoModu… --- ## [Pass Codesys recipes between two controllers that are not on the same network](https://www.wago.community/t/pass-codesys-recipes-between-two-controllers-that-are-not-on-the-same-network/2795)
**Author:** [@colsen](https://www.wago.community/u/colsen)\ **Replies:** 2\ **Last updated:** [July 13, 2026, 10:25pm UTC](https://www.wago.community/t/pass-codesys-recipes-between-two-controllers-that-are-not-on-the-same-network/2795 "2026-07-13T22:25:29Z")
Codesys 3.5.21.3 using WebVisu on a CC-100. I have a client that is hoping that he can download a recipe from my recipe manager in one PLC and upload it to another. The two PLCs are not on the same network. My research … --- ## [Missing files when opening a project in codesys](https://www.wago.community/t/missing-files-when-opening-a-project-in-codesys/2812)
**Author:** [@kaushikvishal6999](https://www.wago.community/u/kaushikvishal6999)\ **Replies:** 1\ **Last updated:** [July 13, 2026, 6:45am UTC](https://www.wago.community/t/missing-files-when-opening-a-project-in-codesys/2812 "2026-07-13T06:45:16Z")
i use Codesys version 3.5 SP19 patch 17. when i try to open a project applicaiton which was sent to me from a colleague, some files in projects are missing inside codesys. How to open a project application without losin… --- ## [Wago 8112 communication with Weintek 2108x2 HMI](https://www.wago.community/t/wago-8112-communication-with-weintek-2108x2-hmi/2762)
**Author:** [@varenalen](https://www.wago.community/u/varenalen)\ **Replies:** 1\ **Last updated:** [June 29, 2026, 4:03pm UTC](https://www.wago.community/t/wago-8112-communication-with-weintek-2108x2-hmi/2762 "2026-06-29T16:03:01Z")
Hi everyone, I am trying to establish communication between a WAGO 750-8112 PLC and a Weintek cMT2108X2 HMI, but I am unable to get stable communication working. PLC Details: WAGO 750-8112 Firmware Version: 28 … --- ## [Bus Mapping Data Types INT or WORD?](https://www.wago.community/t/bus-mapping-data-types-int-or-word/2791)
**Author:** [@MootBoot](https://www.wago.community/u/MootBoot)\ **Replies:** 2\ **Last updated:** [June 29, 2026, 3:57pm UTC](https://www.wago.community/t/bus-mapping-data-types-int-or-word/2791 "2026-06-29T15:57:55Z")
Hello, I am looking for insight on why analog input module data type changes between INT and WORD for different use cases. I understand underlying data is consistent but I would like to structure code to use explicit co… --- ## [Tech Note : CODESYS Persistent Variables](https://www.wago.community/t/tech-note-codesys-persistent-variables/1845)
**Author:** [@MikePsaltis](https://www.wago.community/u/MikePsaltis)\ **Replies:** 7\ **Last updated:** [June 29, 2026, 3:53pm UTC](https://www.wago.community/t/tech-note-codesys-persistent-variables/1845 "2026-06-29T15:53:34Z")
This is short note for new users to CODESYS on how to use local, retain, and persistent retain variables. Local or Global Vars - Values that will be re-initialized when the PLC is rebooted or turned on and off. An examp… --- ## [Official context for agentic workflow](https://www.wago.community/t/official-context-for-agentic-workflow/2784)
**Author:** [@pallluch](https://www.wago.community/u/pallluch)\ **Replies:** 0\ **Last updated:** [June 24, 2026, 5:43am UTC](https://www.wago.community/t/official-context-for-agentic-workflow/2784 "2026-06-24T05:43:40Z")
Hello, As everyone is aware AI is becoming more and more popular in engineering workflow. I myself have been testing few LLMs like Antigravity CLI and Claude Code with open-sourced MCP-server linked below (not official … --- ## [OPC UA server crash pfc200](https://www.wago.community/t/opc-ua-server-crash-pfc200/2638)
**Author:** [@\_sbohata](https://www.wago.community/u/_sbohata)\ **Replies:** 13\ **Last updated:** [June 23, 2026, 4:42am UTC](https://www.wago.community/t/opc-ua-server-crash-pfc200/2638 "2026-06-23T04:42:04Z")
Hello everyone! I’m having an issue where an unhandled exception in the OPC UA server causes the PLC to crash up to several times a day. The appearance of this exception is very inconsistent but from what I can tell it … --- ## [Codesys FSoE on Wago controllers](https://www.wago.community/t/codesys-fsoe-on-wago-controllers/2766)
**Author:** [@VegardS](https://www.wago.community/u/VegardS)\ **Replies:** 1\ **Last updated:** [June 18, 2026, 7:29am UTC](https://www.wago.community/t/codesys-fsoe-on-wago-controllers/2766 "2026-06-18T07:29:26Z")
Does anyone have experience using FSoE on WAGO controllers, for example with a Beckhoff TwinSAFE EL6910 safety logic terminal and EL1904/EL2904 safety I/O terminals? More specifically, can the CODESYS Safety for EtherCA… --- ## [Web browser to display PDF or HTML file](https://www.wago.community/t/web-browser-to-display-pdf-or-html-file/2578)
**Author:** [@tn7231](https://www.wago.community/u/tn7231)\ **Replies:** 3\ **Last updated:** [June 17, 2026, 11:39am UTC](https://www.wago.community/t/web-browser-to-display-pdf-or-html-file/2578 "2026-06-17T11:39:01Z")
Hi All, I have a HTML help file that I created and would like to make it possible to open this in one of my webvisu screens on a web panel running the main visualization. I was trying to use the web browser element on a… --- ## [Using IO-Link Terminal 750-1657 with PFC200](https://www.wago.community/t/io-link-klemme-750-1657-am-pfc200-nutzen/2602)
**Author:** [@bwurst](https://www.wago.community/u/bwurst)\ **Replies:** 5\ **Last updated:** [June 17, 2026, 9:58am UTC](https://www.wago.community/t/io-link-klemme-750-1657-am-pfc200-nutzen/2602 "2026-06-17T09:58:16Z")
Hello. I am programming a 750-8212 with several classic I/O terminals using CODESYS 3.5, and so far this works. Now I wanted to connect a flow meter via IO-Link to read the totalizer... --- ## [750-890 programming software](https://www.wago.community/t/750-890-programming-software/2764)
**Author:** [@Abdallah](https://www.wago.community/u/Abdallah)\ **Replies:** 1\ **Last updated:** [June 15, 2026, 1:10pm UTC](https://www.wago.community/t/750-890-programming-software/2764 "2026-06-15T13:10:26Z")
I need to know the programming software for 750-890 I have been searching for 3 days now --- ## [Modbus RTU with PFC100 750-8112 (Codesys 3.5)](https://www.wago.community/t/modbus-rtu-mit-pfc100-750-8112-codesys-3-5/2646)
**Author:** [@MAD2026](https://www.wago.community/u/MAD2026)\ **Replies:** 15\ **Last updated:** [June 2, 2026, 2:19pm UTC](https://www.wago.community/t/modbus-rtu-mit-pfc100-750-8112-codesys-3-5/2646 "2026-06-02T14:19:34Z")
Hello everyone, I'm new here :raised\_hand: and I'm coming straight away with a problem for which I currently have no further approach (I'm a bit at a loss) and I'm hoping for your support and/or experiences :flexed\_biceps: ... --- ## [Wago 750-8212 v4.08.09](https://www.wago.community/t/wago-750-8212-v4-08-09/2747)
**Author:** [@Analucia](https://www.wago.community/u/Analucia)\ **Replies:** 2\ **Last updated:** [June 2, 2026, 1:22pm UTC](https://www.wago.community/t/wago-750-8212-v4-08-09/2747 "2026-06-02T13:22:01Z")
Hello! I'm trying to connect to my WAGO 750-8212 PLC, which is running firmware version 4.08.09 (30). I believe this is the latest firmware version. I've downloaded CODESYS 3.5 SP21 (6) and CODESYS 3.5 SP19 (7), but… --- ## [Unresolved reference: WAGOTIMELOCALTIME & WAGOTIMEGETZONEINFO, WAGO Edge Computer 752-9412](https://www.wago.community/t/reference-non-resolue-wagotimelocaltime-wagotimegetzoneinfo-wago-edge-computer-752-9412/2681)
**Author:** [@Evan\_Pereira](https://www.wago.community/u/Evan_Pereira)\ **Replies:** 2\ **Last updated:** [May 20, 2026, 7:59am UTC](https://www.wago.community/t/reference-non-resolue-wagotimelocaltime-wagotimegetzoneinfo-wago-edge-computer-752-9412/2681 "2026-05-20T07:59:56Z")
I just configured a WAGO Edge Computer 752-9412 to run my program on CODESYS. I followed the procedure for "Deploy Control SL" to connect the computer to CODESYS. My compiled program... --- ## [Default password for simulator](https://www.wago.community/t/default-password-for-simulator/2701)
**Author:** [@CITS\_Eddie](https://www.wago.community/u/CITS_Eddie)\ **Replies:** 3\ **Last updated:** [May 15, 2026, 1:33pm UTC](https://www.wago.community/t/default-password-for-simulator/2701 "2026-05-15T13:33:40Z")
I do not recall having this issue before I cannot log into simulator. processor is a 750-8110 What is the default username and password? Does this have to be configured somewhere? What am I missing? Thanks! [Next page](https://www.wago.community/tag/codesys/23.md?match_all_tags=true&page=1&tags%5B%5D=codesys)